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High-precision chip type alloy foil fixed resistor and manufacturing method thereof

A high-precision chip, fixed resistor technology, applied in the direction of resistors, resistor manufacturing, trimming resistors, etc., can solve the problem of large size

Inactive Publication Date: 2019-08-30
BEIJING 718 YOUSHENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the product is large in size and does not meet the trend of miniaturization and light weight development.

Method used

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  • High-precision chip type alloy foil fixed resistor and manufacturing method thereof
  • High-precision chip type alloy foil fixed resistor and manufacturing method thereof
  • High-precision chip type alloy foil fixed resistor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The specific processing process is:

[0043] (1) Select the ceramic substrate according to the product model, and then clean the ceramic substrate; at the same time, select a foil material with a suitable thickness and free-state temperature coefficient according to the product model, resistance value and temperature coefficient requirements, and clean the foil material Pretreatment is carried out; then the treated ceramic substrate 1 and foil 3 are bonded together with adhesive 2 .

[0044] (2) Carry out the first version of pattern copying by photoresist 4, form Figure 3-a the graph shown.

[0045] (3) Perforate the substrate on which the first version of the graphic copy has been carried out, so as to facilitate the positioning of the subsequent process.

[0046] (4) Pattern copying is performed through the photoresist 4 to form resistance lines. And the alloy foil resistance layer is formed into a pattern by corrosion. In this step, the processing method needs t...

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PUM

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Abstract

The invention belongs to the field of alloy foil resistors. The invention discloses a high-precision chip type alloy foil fixed resistor which is a surface-mounted resistor and takes an alloy foil serving as block metal as a resistance layer material. A specially-designed fine alloy foil pattern is formed through photoetching, and then the resistance value and the precision are trimmed through precision laser resistance adjustment. A protective layer covers the surface of the alloy foil chip. The alloy foil chip is electroplated to form a leading-out end. SMD and miniaturization of a high-precision alloy foil product are realized. According to the invention, four models of resistors are provided including RM2012: 2.0 mm * 1.2 mm * 0.6 mm, RM3216: 3.2 mm * 1.6 mm * 0.6 mm, RM5025: 5.0 mm *2.5 mm * 0.6 mm, and RM6332: 6.3 mm * 3.2 mm * 0.6 mm.

Description

[0001] 1. Technical field [0002] The invention belongs to the field of alloy foil resistors. [0003] 2. Background technology [0004] The existing chip film fixed resistors have the production capacity of RMK1005, 1608, 2012, 3216, 5025, 6332 and other sizes of resistors, and have rich experience in processing chip resistors of different sizes. It can achieve the advantages of small size, light weight, reliable quality, etc., but the resistance value accuracy can reach up to ±0.05%, and the resistance temperature characteristic can reach up to ±10×10 -6 / K. [0005] The production line of precision alloy foil resistors with leads is equipped with foiling and photolithography technology and equipment, and has rich experience in graphic design and photolithography processing. This type of resistor has the function of automatically compensating the temperature characteristics of the resistance. It has a small temperature characteristic in a wide temperature range. It has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C1/02H01C1/14H01C17/00H01C17/02H01C17/23H01C17/28
CPCH01C1/02H01C1/14H01C17/003H01C17/02H01C17/23H01C17/28
Inventor 曾炀李强宋文君唐雪松韩丽娜闫晶晶李小龙
Owner BEIJING 718 YOUSHENG ELECTRONICS